Thursday:SPUR Lunchtime Forum: Social justice and rising seas. A recent report by the Pacific Institute concludes that sea level rise will change the character of the California coast, and that adaptation strategies must be evaluated, tested and implemented if the risks identified in the report are to be reduced or avoided. Author Matt Heberger asks what the social implications of these changes will be. 12:30 p.m.

Friday through Sunday:San Francisco Green Festival. Find out how Bay Area neighbors, community nonprofits and city departments are working together to make their cities healthier places to live at this joint project of Global Exchange and Green America.

Saturday:SFBC Bike Buddy Route Ride: Downtown to the Western Addition. Every month, the SFBC Bike Buddies hit the street to acquaint new riders with common or challenging bike commute routes in San Francisco with a Route Ride. In November, learn the best routes from downtown to the Western Addition, highlighting McAllister Street; new riders are encouraged. Time TBA.

Saturday:Different Spokes Monthly Jersey Ride. Join Different Spokes, the San Francisco Bay Area's GLBT cycling club, for its monthly Jersey Ride. All are welcome, and the ride offers different distance and level options. 8:30 a.m.

Saturday:Ecological History (north) Bike Tour. This trip through San Francisco's lost sand dunes, ponds, creeks and coastline will focus on the city from downtown north, covering the heart of the city, the waterfront and Yerba Buena cove, Telegraph Hill, Black Point, and Crissy Field in the Presidio. It's a "social, historical and critical four-hour tour through the city's ecological past and present." 12-4 p.m.

Keep an eye on the calendar for updated listings. Got an event we should know about? Drop us a line.

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Word On The Street

“The fact we cannot say definitively that ticketing cyclists for not making full and complete stops necessarily decreases injuries or otherwise reduces collisions gets to the very heart of the issue: Sanford's impending crackdown is not data-driven...
And all the while, this crackdown will better enable motorists near and far to continue, without consequences, to commit the five traffic violations that the data clearly shows us are causing the greatest harm to the most road users.
Bias, bias, bias.”